Light pollution can interfere with which of the following natural processes?
1. Plant growth cycles
2. Nocturnal animal behavior
3. Human circadian rhythms
4. Ozone layer depletion

Select the correct answer using the code given below:
(a) 1 and 2 only
(b) 1, 2, and 3 only
(c) 2 and 4 only
(d) 1, 2, 3, and 4

Question

Light pollution can interfere with which of the following natural processes?
1. Plant growth cycles
2. Nocturnal animal behavior
3. Human circadian rhythms
4. Ozone layer depletion

Select the correct answer using the code given below:
(a) 1 and 2 only
(b) 1, 2, and 3 only
(c) 2 and 4 only
(d) 1, 2, 3, and 4

ONLiNE UPSC · Accepted Answer

Light pollution is the excessive, misdirected, or intrusive use of artificial light, which disrupts natural darkness. It affects ecosystems, human health, and astronomical observations by brightening the night sky and interfering with natural cycles. The main types include skyglow, glare, light trespass, and clutter.
Some of the negative impact that can interfere with natural processes are:
● Plant growth cycles: Artificial light at night disrupts flowering, photosynthesis, and dormancy cycles of plants. Hence, it is correct.

● Nocturnal animal behavior: Light pollution affects nocturnal animals, disrupting hunting, reproduction, and migration patterns. Hence, it is correct.

● Human circadian rhythms: Exposure to artificial light at night suppresses melatonin production, leading to sleep disorders and health issues. Hence, it is correct.
However, Ozone depletion is caused by CFCs and other pollutants, not light pollution. Artificial light does not break down ozone molecules. Hence, it is not correct.

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M Question 1	⏱ 0
Light pollution can interfere with which of the following natural processes? 1. Plant growth cycles 2. Nocturnal animal behavior 3. Human circadian rhythms 4. Ozone layer depletion Select the correct answer using the code given below: (a) 1 and 2 only (b) 1, 2, and 3 only (c) 2 and 4 only (d) 1, 2, 3, and 4